I'm new to this forum. I have a 2012 X1 xdrive28i with 19,000kms on it. I've had the car for a year with no issues whatsoever until this weekend.

On a road trip i was on the engine lost significant power and this Engine Malfunction Loss of Power code appeared. I turned off the engine and waited, restarted and the code cleared and all was fine. Upon my return home the code appeared 3 more times.

I do have an appt scheduled for Monday. Has anyone here experienced this and what came from it?

Check with your local auto parts store and see if they will read the codes for you, it won't tell you a bad part per se (unless a gas cap) but it will give the code(s) for whatever malfunctions it saw.

I had the same issue today, the engine was very jerky and the whole car was shaking when idling. Got an appointment friday for a checkup (not related to this)

Had this problem several times since then. They replaced the injectors under warranty and later they replaced the spark plugs ahead of the maintenance schedule. It still isn't solved, had it several times after that. Car is running on 3 or 2 cylinders, depends.
But it does really suck, it only happens with WOT and it happenned twice while I was driving on the Nurburgring

What should we expect if we feel that maybe the wastegate is going on us? Slower response, lack of power at a specific rpm range? I'm asking because I have been having high pitch sounds coming from the turbo and have been concerned. I'm not sure if this is just me or it is something that maybe on te way out.

Last month my wife's X1 (N20) went into limp mode/reduced engine power a few times, so we brought it into the dealership. They diagnosed it as a faulty wastegate actuator and replaced it under warranty (17,500 mi). They told me the cause could have been brought on by "spirited driving". My wife drives like a little old lady. When I drive it, on occasion, I do lay into it a little bit, maybe passing on the highway or coming up an on-ramp, but I'm not banging it off the rev-limiter or anything.

Since the repair, it just doesn't feel the same. We just got back from a 500-mi. round trip and it seems like there's a lack of mid-range grunt. I have to press the accelerator down further in order to accelerate at the same rate, in any gear, as I did before the repair.

Has anyone experienced this? Could the dealer have recoded the computer or uploaded some sort of an output-reducing software in order to avoid a relapse?

Last month my wife's X1 (N20) went into limp mode/reduced engine power a few times, so we brought it into the dealership. They diagnosed it as a faulty wastegate actuator and replaced it under warranty (17,500 mi). They told me the cause could have been brought on by "spirited driving". My wife drives like a little old lady. When I drive it, on occasion, I do lay into it a little bit, maybe passing on the highway or coming up an on-ramp, but I'm not banging it off the rev-limiter or anything.

Since the repair, it just doesn't feel the same. We just got back from a 500-mi. round trip and it seems like there's a lack of mid-range grunt. I have to press the accelerator down further in order to accelerate at the same rate, in any gear, as I did before the repair.

Has anyone experienced this? Could the dealer have recoded the computer or uploaded some sort of an output-reducing software in order to avoid a relapse?

Thanks for any input.

The dealer wouldn't install power reducing software. It's probably placebo effect. Could also be the trans re-learning your driving habits which can take awhile.

N55 is the 35i, N20 is the 28i. Although in Europe and ROW, the 28i used to be the N52 N/A 6 before late 2011. 2012, all 28i models are powered by the N20/N26 depending on your state's emission laws. The N55 has always been in the 35i variant.

N55 is the 35i, N20 is the 28i. Although in Europe and ROW, the 28i used to be the N52 N/A 6 before late 2011. 2012, all 28i models are powered by the N20/N26 depending on your state's emission laws. The N55 has always been in the 35i variant.